Joshua 13:8 Midrash

עִמּ֗וֹ הָרֽאוּבֵנִי֙ וְהַגָּדִ֔י לָקְח֖וּ נַחֲלָתָ֑ם אֲשֶׁר֩ נָתַ֨ן לָהֶ֜ם מֹשֶׁ֗ה בְּעֵ֤בֶר הַיַּרְדֵּן֙ מִזְרָ֔חָה כַּאֲשֶׁר֙ נָתַ֣ן לָהֶ֔ם מֹשֶׁ֖ה עֶ֥בֶד יְהוָֽה׃

With him the Reubenites and the Gadites received their inheritance, which Moses gave them, beyond the Jordan eastward, even as Moses the servant of the LORD gave them;